Definition: You are given a question on human aging. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The term "cohort" refers to
(A)An individual's chronological age (B)A generation of people who lived through major events (C)A person's gender (D)A group of people living in the same culture

B